"But I took the right time to have the right rest. I did all the things that the doctors told me. Then I felt great practising in Acapulco, playing very well, but then just the day before... I felt it again. So that's the real thing.

"For me mentally the second one was even harder than what happened in Australia, even if Australia was a grand slam and was an opportunity lost.

"The second one was frustrating because I did all the things the right way."